DanMan2k06
NAXJA Forum User
- Location
- Damascus, MD
Some of you guys might have seen a thread or two of mine eluding to an engine rebuild or swap recently. Well I finally put it in over the weekend and started it up, and now it's knocking pretty bad. I'm really diappointed.
I used an Engine-Tech rebuild kit, bored .030" over. New EVERYTHING. Minus the connecting rods. New crank, new cam, new pistons, reman'd head, new lifters, rockers, pushrods, everything.
The first time I cranked it over, the distributor was indexed wrong. It took about three 10-second cranking sessions to realize ok, somethings wrong. Flipped it 180, it started right up. the lifters were loud for about 5 seconds as usual, but then quieted down to normal. However, a very audible knock did not go away. Almost sounds like a diesel. It's definitely not from the head or valve-train. You can hear it best if you stick your head in the driver's wheel well. It goes away once the RPM's climb but as soon as your drop back to 1000rpms or idle it's clear as day. Can be heard clearly in the cab when idling as well.
I used Rotella 10w-30 and 2 teaspoons of Lucas zddp additive for break-in. After she started I drove around town, varying rpms and load constantly, did 2 or 3 WOT rips, and changed the oil at 20 miles.
What do you guys think it could be? Main bearings? Wrist pin? It's DEFINITELY a knock. Not a tick or a ping or a mothereffin squawk, but a solid knock. Best description is someone holding two small blocks of wood and hitting them together.
Edit: Should be moved to OEM tech.
I used an Engine-Tech rebuild kit, bored .030" over. New EVERYTHING. Minus the connecting rods. New crank, new cam, new pistons, reman'd head, new lifters, rockers, pushrods, everything.
The first time I cranked it over, the distributor was indexed wrong. It took about three 10-second cranking sessions to realize ok, somethings wrong. Flipped it 180, it started right up. the lifters were loud for about 5 seconds as usual, but then quieted down to normal. However, a very audible knock did not go away. Almost sounds like a diesel. It's definitely not from the head or valve-train. You can hear it best if you stick your head in the driver's wheel well. It goes away once the RPM's climb but as soon as your drop back to 1000rpms or idle it's clear as day. Can be heard clearly in the cab when idling as well.
I used Rotella 10w-30 and 2 teaspoons of Lucas zddp additive for break-in. After she started I drove around town, varying rpms and load constantly, did 2 or 3 WOT rips, and changed the oil at 20 miles.
What do you guys think it could be? Main bearings? Wrist pin? It's DEFINITELY a knock. Not a tick or a ping or a mothereffin squawk, but a solid knock. Best description is someone holding two small blocks of wood and hitting them together.
Edit: Should be moved to OEM tech.
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